Gaya APA

Swanson, C, P., Fitzpatrick, F, L. (NULL). Our plant resources plants and their economics importance . New: New York: Holt, Rinehart and Winston; 1964.

Gaya MLA

Swanson, Carl, P.., Fitzpatrick, Frederick, L. "Our plant resources plants and their economics importance". New: New York: Holt, Rinehart and Winston; 1964, NULL. Text.